Vehicle Head-Up Display Control for Stable Virtual Image Position
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Solution Overview
Problem
Conventional head-up display devices cause discomfort to occupants due to the movement of the virtual image when the projection range is adjusted, leading to a sense of disorientation and distraction.
Innovation Solution
A head-up display device with a projector, an adjustment mechanism for the projection range, and a state controller that maintains the display position of the virtual image by controlling the projector's state in response to adjustments, ensuring the image remains stable in the occupant's view during projection range changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the projection range is adjusted by the adjustment mechanism, then the projection area coverage is improved, but the virtual image position stability deteriorates
Solution Approach 1:
The state controller pre-adjusts the display image parameters (such as image position, size, or shape) before the projection range adjustment occurs. This preliminary action compensates for the expected displacement of the virtual image, ensuring that the virtual image remains stable in the occupant's field of view even as the projection range changes. The controller calculates the required image parameter adjustments based on the anticipated projection range movement and applies them in advance.
2Adaptability or versatility
If the projection range is mechanically displaced, then the adaptability to different viewing conditions is improved, but the occupant comfort deteriorates due to virtual image movement
Solution Approach 1:
The state controller continuously monitors the projection range position and the display image parameters, and dynamically adjusts the image parameters in response to projection range changes. This feedback mechanism ensures that the virtual image position remains stable in the occupant's field of view, preventing discomfort and distraction. The controller receives information about the projection range displacement and automatically compensates by adjusting the display image to maintain proper virtual image positioning.
Data Source
AI summary
A head-up display device for a vehicle and superimposing a virtual image on the foreground of an occupant includes: a projector that emits light of a display image to be displayed as the virtual image; an adjustment mechanism that mechanically displaces the projection range of a projection member, which is arranged on the vehicle and projects the light emitted from the projector; and a state controller that controls a state of the display image to be projected by the projector so as to maintain the display position of the virtual image in accordance with the displacement of the projection range by the adjustment mechanism.